µTorrent is an efficient and feature rich BitTorrent client for Windows sporting a very small footprint. It was designed to use as little cpu, memory and space as possible while offering all the functionality expected from advanced clients. Most of the features present in other BitTorrent clients are present in µTorrent, including bandwidth prioritization, scheduling, RSS auto-downloading and Mainline DHT (compatible with BitComet). Additionally, µTorrent supports the Protocol Encryption joint specification (compatible with Azureus 2.4.0.0 and above, BitComet 0.63 and above) and peer exchange. µTorrent was written with efficiency in mind. Unlike many torrent clients, it does not hog valuable system resources - typically using less than 6MB of memory, allowing you to use the computer as if it weren't there at all. Additionally, the program itself is contained within a single executable less than 220 KB in size.
Features:
* Multiple simultaneous downloads
* Configurable bandwidth scheduler
* Global and per-torrent speed limiting
* Quick-resumes interrupted transfers
* RSS Downloader
* Trackerless support (Mainline DHT)
Although compact and resource-friendly, µTorrent does not skimp on features, with a feature set that rivals those of larger clients, such as Azureus, BitComet, and BitTornado. µTorrent's more notable features include:
Bandwidth limiter (automatic and manual)
Customizable interface
Disk Cache system
Distributed Hash Table (DHT) support
Download bar
Download scheduler
Embedded tracker
HTTPS tracker support
Initial Seeding (Super Seeding)
IP Blocklist support
Localization
Multi-scrape support
Multi-torrent interface
NAT Port Mapping Protocol (NAT-PMP) support
Peer Exchange
Protocol Encryption
Proxy support
RSS "Broadcatching"
Search bar
Selective file downloading
Tetris (Easter Egg)
Unicode support
Universal Plug and Play (UPnP) support
Web Interface
Web Seeding support
What is not in 1.9:
UDP hole punching (yet?)
UDP tracker
What is in 1.9:
uTP, the micro transport protocol. This UDP-based reliable transport is designed to minimize latency, but still maximize bandwidth when the latency is not excessive. We use this for communication between peers instead of TCP, if both sides support it. In addition, we use information from this transport, if active, to control the transfer rate of TCP connections. This means uTorrent, when using uTP, should not kill your net connection - even if you do not set any rate limits.
Alpha更新：http://forum.utorrent.com/viewtopic.php?id=49813
官网：http://www.utorrent.com
~Support Windows 98/ME, NT/2000, XP, 2003, and Vista~
自己弄绿色版提示：
程序安装会跑到C:\Documents and Settings\XXX(你的用户名)\Application Data下。复制uTorrent目录到任何地方就是绿色版了，下次不会再在Application Data目录下生成东西了。
v1.9 build 13521 Alpha 官方下载：
http://download.utorrent.com/beta/utorrent-1.9-alpha-13521.upx.exe
v1.8.1 build 12639 官方下载：
http://download.utorrent.com/1.8.1/utorrent.exe
多国语言包：
http://www.utorrent.com/download/langpacks/dl.php?build=12616
一些皮肤：
http://www.utorrent.com/skins.php
http://www.utorrent.com/download/langpacks/dl.php?build=3295
如果多国语言包你下载回来的文件名是dl.php，那么把这个文件改名为：utorrent.lng，放在C:\Program Files\uTorrent下就OK啦。 或者把utorrent.lng文件和你下载的安装程序放在同一目录，然后安装，到程序里选择一下语言。